Validity of the calculation method. 4.1. The validity of the calculation method shall be established to the satisfaction of the Technical Service, e.g. on the basis of a comparative test with a similar vehicle. Annex 4 Explanatory diagrams Figure 1 Access to service doors (See Annex 3, paragraph 7.7.1.) Test gauge 1 Test gauge 2 Vehicle class Height of the upper panel (mm) (Dimension "A" Figure 1) Test gauge 1 Test gauge 2 Class A 950∗ 950 Class B 700∗ 950 Class I 1,100 1,100 Class II 950 1,100 Class III 850 1,100 ∗ For vehicles of Class A or B, the lower panel may be displaced horizontally relative to the upper panel provided that it is in the same direction. Figure 2 Access to service doors
